prior vs antecedent

prior and antecedent both are nouns.

Word	Noun	Adjective	Verb	Adverb
prior	Yes	Yes	No	No
antecedent	Yes	Yes	No	No

prior (noun)	antecedent (noun)
the head of a religious order; in an abbey the prior is next below the abbot	the referent of an anaphor; a phrase or clause that is referred to by an anaphoric pronoun
	a preceding occurrence or cause or event
	someone from whom you are descended (but usually more remote than a grandparent)
	anything that precedes something similar in time

prior (adjective)	antecedent (adjective)
earlier in time	preceding in time or order